Replace all backtick template literals inside addFlowCard (which lives
inside a PHP heredoc) with plain string concatenation. PHP was evaluating
${k}, ${Date.now()}, ${menuOpts}, etc. as PHP variable expressions,
emitting deprecation warnings inside the <script> block and corrupting
the JavaScript — causing all tab buttons on bot-config to stop responding.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>